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Trends in Extraction and Detection of Phenolic Compounds and Their...
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Trends in Extraction and Detection of Phenolic Compounds and Their Application

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Separation Processes".

Deadline for manuscript submissions: closed (10 May 2023) | Viewed by 8898

Special Issue Editor

Dr. Birghila Semaghiul

E-Mail Website
Guest Editor
Department of Chemistry and Chemical Engineering, Ovidius University of Constanta, 124 Mamaia, 900527 Constanta, Romania
Interests: analytical methods; environmetal analysisis; heavy metals; organic compounds

Special Issue Information

Dear Colleagues,

Polyphenols are naturally occurring micronutrients that are present in many food sources. It is generally accepted that most polyphenols are potent antioxidants and may also possess anti-inflammatory properties. Recently, the food industry has become interested in byproducts derived from plants and fruits due to their rich content of polyphenols and their potential use for functional foods or food supplements. Many efforts have been made to achieve efficient extraction and highly sensitive detection of phenolic compounds.

The antioxidant compounds present in the extracts of natural products are complex, and their activities and mechanisms largely depend on the composition and conditions of the testing system. Therefore, it is necessary to perform several types of measurements of the antioxidant activity to evaluate the antioxidant properties of the phenolic compounds in food products.

The topics of this Special Issue, titled “Trends in Extraction and Detection of Phenolic Compounds and Their Application”, include but are not limited to the following:

  • Different methods of extraction and detection of phenolic compounds;
  • Phenolic compounds’ potential uses and applications;
  • Investigation and comparison of phenolic profiles and antioxidant activities measured via different methods;
  • Analysis of the correlations among individual and total phenolic contents and antioxidant activity;
  • Quantification of the contribution of individual phenolic compounds to antioxidant activity.

Dr. Birghila Semaghiul
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Processes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • phenolic compounds
  • extraction and separation
  • analysis techniques
  • antioxidant and antiseptic properties
  • measurement of antioxidant activity
  • food
  • correlation applications

Published Papers (4 papers)

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Research

17 pages, 1482 KiB  
Article
Environmentally Friendly Extraction from Picea Abies Bark as an Approach to Accessing Valuable Antioxidants in Biorefineries
by Franz Zeppetzauer, Raphaela Süss, Richard Nadányi, Robert F. Putz, Anton Lisý, Christian Paulik, Igor Šurina, Petra Strižincová, Kateryna Huemer and Birgit Kamm
Processes 2023, 11(7), 2145; https://doi.org/10.3390/pr11072145 - 18 Jul 2023
Viewed by 955
Abstract
Every year, the pulp and wood-processing industry produces large side streams of bark, the valorisation of which is desirable for both economic and environmental reasons. We investigated organosolv extraction of antioxidants from Picea abies bark using various ratios of ethanol/water with the goal [...] Read more.
Every year, the pulp and wood-processing industry produces large side streams of bark, the valorisation of which is desirable for both economic and environmental reasons. We investigated organosolv extraction of antioxidants from Picea abies bark using various ratios of ethanol/water with the goal of obtaining high yields of these desirable compounds. The resulting extracts were analysed (I) for their total contents of phenols (TPC), flavonoids (TFC) and tannins (TTC), and (II) for their antioxidant activity using the DPPH radical scavenging method. The highest total yield of bark extract (14.78%) and the highest concentrations of dry extracts of TPC (324.80 mg g−1), TFC (62.55 mg g−1) and TTC (83.63 mg g−1) were obtained under mild conditions (100 °C extraction temperature and an ethanol/water solvent ratio of 50%, v/v). DPPH antioxidant activity index (AAI) ranged from 0.68 (pure water extract) to 1.31. This antioxidant effect was increased to 1.59 by adding oligolignin from the organosolv process. In the extracts, gas chromatography–mass spectrometry (GC–MS) found nine aromatic carboxylic acids, including phenolic acids and the flavonoid compounds quercetin and (+)-catechin. Our environmentally friendly approach will form the basis for pilot plant and industrial applications. Full article
(This article belongs to the Special Issue Trends in Extraction and Detection of Phenolic Compounds and Their Application)
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16 pages, 3124 KiB  
Article
Bioassay-Guided Characterization, Antioxidant, Anti-Melanogenic and Anti-Photoaging Activities of Pueraria thunbergiana L. Leaf Extracts in Human Epidermal Keratinocytes (HaCaT) Cells
by Min Jeong Kim, Seo Yeon Shin, Nu Ri Song, Sunoh Kim, Sang Ouk Sun and Kyung Mok Park
Processes 2022, 10(10), 2156; https://doi.org/10.3390/pr10102156 - 21 Oct 2022
Cited by 1 | Viewed by 1982
Abstract
Although the roots and flowers of P. thunbergiana are known to have various physiologically active effects, studies on the anti-melanin production and anti-photoaging effects of its leaf extracts and cellular mechanisms are still lacking. In this study, we evaluated the possibility of using [...] Read more.
Although the roots and flowers of P. thunbergiana are known to have various physiologically active effects, studies on the anti-melanin production and anti-photoaging effects of its leaf extracts and cellular mechanisms are still lacking. In this study, we evaluated the possibility of using Pueraria thunbergiana leaves as a natural material for skin whitening and anti-aging-related functional cosmetics. The 30% ethyl alcohol (EtOH) extract from P. thunbergiana leaves was fractionated using n-hexane, ethyl acetate (EtOAc), butanol, and aqueous solution to measure their whitening, and anti-aging effects. The EtOAc fraction contained a high content of phenolic and flavonoids and showed higher 1,1-diphenyl-2-picryhydrazyl (DPPH) and 2,2-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS) radical scavenging activities than the other fractions. It was also confirmed that the EtOAc fraction markedly inhibited α-melanocyte stimulating hormone (α-MSH)-induced melanogenesis in B16F10 melanoma cells. In addition, the EtOAc fraction showed a protective effect against ultraviolet B (UVB) in HaCaT cells and increased the collagen synthesis that was decreased due to UVB exposure. Matrix metalloproteinase-1 (MMP-1) activity and MMP-1 protein expression were reduced in human epidermal keratinocytes (HaCaT) cells. These results indicate that the EtOAc fraction has superior antioxidant activity, anti-melanogenesis, and anti-photoaging effects compared to the other fractions. Therefore, in this study, we confirmed the potential of P. thunbergiana leaf extract as a functional cosmetic ingredient, and it can be used as basic data for the physiological activity of P. thunbergiana leaf extracts. Full article
(This article belongs to the Special Issue Trends in Extraction and Detection of Phenolic Compounds and Their Application)
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Graphical abstract

21 pages, 4831 KiB  
Article
UPLC-HRMS Polyphenolic Characterization, Contents and Antioxidant Activity of Zingiber officinale Roscoe rhizomes from Costa Rica
by Mirtha Navarro-Hoyos, Mónica Acuña-Quirós, María Isabel Quirós-Fallas, Felipe Vargas-Huertas, Krissia Wilhelm-Romero, Felipe Vásquez-Castro, Diego Alvarado-Corella and Andrés Sánchez-Kopper
Processes 2022, 10(4), 691; https://doi.org/10.3390/pr10040691 - 1 Apr 2022
Cited by 2 | Viewed by 1767
Abstract
Zingiber officinale Roscoe rhizomes have been associated with multiple health benefits, such as blocking blood clotting, digestive and antinausea effects and aid in respiratory conditions. These effects have been linked with their polyphenolic main metabolites, gingerols and shogaols. Herewith, we report a detailed [...] Read more.
Zingiber officinale Roscoe rhizomes have been associated with multiple health benefits, such as blocking blood clotting, digestive and antinausea effects and aid in respiratory conditions. These effects have been linked with their polyphenolic main metabolites, gingerols and shogaols. Herewith, we report a detailed study on the polyphenolic profile and in the contents of main gingerols and shogaol as well as the antioxidant activity of extracts from Z. officinale rhizomes (n = 17) produced in Costa Rica. Using UPLC-QTOF-ESI MS, a total of 34 polyphenols were identified, grouped in 12 types of structures. In addition, our findings on the main metabolites using UPLC-DAD show all rhizomes complying with total gingerols (TG) content established by the United States Pharmacopeia (USP). At an individual level, samples SR-1 and NR-4 show the higher contents and also exhibit the highest Folin–Ciocalteu (FC) reducing capacity results as well as the best DPPH antioxidant values. In addition, Pearson correlation analysis results showed positive correlation (p < 0.05) between TG and 6-gingerol with FC results and negative correlation (p < 0.05) between 6-gingerol, TG and FC with DPPH results. In turn, Principal Component Analysis (PCA) indicated variability in the composition associated with their region of origin and confirmed that NR-3, NR-4, and especially SR-1 stand out significatively, showing the highest PC1 because of its particularly high TG, 6-gingerol and antioxidant activities. Finally, results from controlled experimental plots of Z. officinale rhizomes (n = 6) indicated influence on metabolites content with higher values for a shorter harvest time and high tunnel cultivation. Therefore, our findings indicate the value of Z. officinale in the elaboration of products with potential benefits for health, delivering extracts with higher levels of gingerols than previous reports and exhibiting high antioxidant activity. Full article
(This article belongs to the Special Issue Trends in Extraction and Detection of Phenolic Compounds and Their Application)
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11 pages, 255 KiB  
Article
Relationship between Total Phenolic Content, Antioxidant Capacity, Fe and Cu Content from Tea Plant Samples at Different Brewing Times
by Simona Dobrinas, Alina Soceanu, Viorica Popescu, Ionela Carazeanu Popovici and Daniela Jitariu
Processes 2021, 9(8), 1311; https://doi.org/10.3390/pr9081311 - 29 Jul 2021
Cited by 15 | Viewed by 3405
Abstract
The purpose of this study was to investigate the antioxidant capacity of different tea plant: mint, linden, chamomile, St. John’s wort, green and black tea in relation to total phenolic content. The antioxidant capacity of the tea infusions at different brewing times was [...] Read more.
The purpose of this study was to investigate the antioxidant capacity of different tea plant: mint, linden, chamomile, St. John’s wort, green and black tea in relation to total phenolic content. The antioxidant capacity of the tea infusions at different brewing times was determined using DPPH assay while the total phenolic content (TPC) was assessed using the modified Folin-Ciocalteu method. The results showed that there were significant statistical differences in antioxidant capacity depending on infusion time, according to one-way ANOVA analysis. Leaves used as components of tea infusions were analyzed by FAAS for their content of iron and copper in the dry product and in the infusion. The correlation between TPC and DPPH capacity of tea plant infusions was evaluated by Pearson correlation matrix. Total phenolics compounds content was positively and significantly correlated with DPPH capacity for all infusions time. Significant correlation was observed between TPC and the copper concentration (p < 0.05). Consequently, the correlations between the physicochemical parameters, TPC, DPPH capacity, Fe and Cu content suggested that the TPC may be a good indicator of the DPPH capacity in the tea infusions and also, suggested the influence of antioxidant compounds on mineral bioavailability. Full article
(This article belongs to the Special Issue Trends in Extraction and Detection of Phenolic Compounds and Their Application)
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